Don't use aluminum
pop rivets. Use stainless ones, available at West Marine
or better hardware
stores. Borrow a high strength pop riveter from a rigger or electrician. Add an extra conduit for future stuff that you aren't even thinking about now, for radar
, instruments, AIS antenna
or VHF, or (again) stuff you haven't even thought about yet.
Here are some pictures of how to install the pop rivets. I suggest placing two or three holes, 3/16" or equivalent for metric pop rivets, horizontally, every 3 feet (or one meter) vertically. The reason is to use the center hole to place the conduit support when drilling and pop-riveting. When all done, fill the center hole with a pop rivet for a clean look. One conduit can go just high enough to reach the area where you would place a radar
, foredeck light. steaming light,and hailer/fog horn, just below the lower spreaders, generally. Then the other goes all the way to the masthead. I use electrical
cable, not individual wires. Don't wire tie them together!
While you are doing this (I'm assuming you have removed the mast to work on level surface), take the time to disassemble EVERYTHING on the mast, replace ALL of the existing fasteners, electrical
wiring, coax, etc., repaint the mast and lube all the sheaves. You don't get a chance to do this work often. REPLACE YOUR COMPRESSION
POSTS AND BOLTS HOLDING THE TANGS IN PLACE.